• 企业400电话
  • 微网小程序
  • AI电话机器人
  • 电商代运营
  • 全 部 栏 目

    企业400电话 网络优化推广 AI电话机器人 呼叫中心 网站建设 商标✡知产 微网小程序 电商运营 彩铃•短信 增值拓展业务
    MongoDB整库备份与还原以及单个collection备份、恢复方法
    mongodump.exe备份的原理是通过一次查询获取当前服务器快照,并将快照写入磁盘中,因此这种方式保存的也不是实时的,因为在获取快照后,服务器还会有数据写入,为了保证备份的安全,同样我们还是可以利用fsync锁使服务器数据暂时写入缓存中。

    高效开源数据库(mongodb)下载地址:https://www.jb51.net/softs/41751.html

    备份前的检查
    > show dbs
    MyDB 0.0625GB
    admin (empty)
    bruce 0.0625GB
    local (empty)
    test 0.0625GB
    > use MyDB
    switched to db MyDB
    > db.users.find()
    { "_id" : ObjectId("4e290aa39a1945747b28f1ee"), "a" : 1, "b" : 1 }
    { "_id" : ObjectId("4e2cd2182a65c81f21566318"), "a" : 3, "b" : 5 }
    >

    整库备份:
    mongodump -h dbhost -d dbname -o dbdirectory
    -h:MongDB所在服务器地址,例如:127.0.0.1,当然也可以指定端口号:127.0.0.1:27017
    -d:需要备份的数据库实例,例如:test
    -o:备份的数据存放位置,例如:c:\data\dump,当然该目录需要提前建立,在备份完成后,系统自动在dump目录下建立一个test目录,这个目录里面存放该数据库实例的备份数据。

    mongodump的官方说明(可通过mongodump --help查看):
    options:
     --help          produce help message
     -v [ --verbose ]     be more verbose (include multiple times for more
                  verbosity e.g. -vvvvv)
     --version        print the program's version and exit
     -h [ --host ] arg    mongo host to connect to ( /s1,s2 for
                  sets)
     --port arg        server port. Can also use --host hostname:port
     --ipv6          enable IPv6 support (disabled by default)
     -u [ --username ] arg  username
     -p [ --password ] arg  password
     --dbpath arg       directly access mongod database files in the given
                  path, instead of connecting to a mongod server -
                  needs to lock the data directory, so cannot be used
                  if a mongod is currently accessing the same path
     --directoryperdb     if dbpath specified, each db is in a separate
                  directory
     --journal        enable journaling
     -d [ --db ] arg     database to use
     -c [ --collection ] arg collection to use (some commands)
     -o [ --out ] arg (=dump) output directory or "-" for stdout
     -q [ --query ] arg    json query
     --oplog         Use oplog for point-in-time snapshotting
     --repair         try to recover a crashed database
     --forceTableScan     force a table scan (do not use $snapshot)
    

    整库恢复:
    mongorestore -h dbhost -d dbname –directoryperdb dbdirectory
    -h:MongoDB所在服务器地址
    -d:需要恢复的数据库实例,例如:test,当然这个名称也可以和备份时候的不一样,比如test2
    –directoryperdb:备份数据所在位置,例如:c:\data\dump\test,这里为什么要多加一个test,而不是备份时候的dump,读者自己查看提示吧!
    –drop:恢复的时候,先删除当前数据,然后恢复备份的数据。就是说,恢复后,备份后添加修改的数据都会被删除,慎用哦!

    mongorestore的官方说明(可通过mongorestore --help查看):
    options:
     --help         produce help message
     -v [ --verbose ]    be more verbose (include multiple times for more
                 verbosity e.g. -vvvvv)
     --version        print the program's version and exit
     -h [ --host ] arg    mongo host to connect to ( /s1,s2 for sets)
     --port arg       server port. Can also use --host hostname:port
     --ipv6         enable IPv6 support (disabled by default)
     -u [ --username ] arg  username
     -p [ --password ] arg  password
     --dbpath arg      directly access mongod database files in the given
                 path, instead of connecting to a mongod server -
                 needs to lock the data directory, so cannot be used
                 if a mongod is currently accessing the same path
     --directoryperdb    if dbpath specified, each db is in a separate
                 directory
     --journal        enable journaling
     -d [ --db ] arg     database to use
     -c [ --collection ] arg collection to use (some commands)
     --objcheck       validate object before inserting
     --filter arg      filter to apply before inserting
     --drop         drop each collection before import
     --oplogReplay      replay oplog for point-in-time restore
     --oplogLimit arg    exclude oplog entries newer than provided timestamp
                 (epoch[:ordinal])
     --keepIndexVersion   don't upgrade indexes to newest version
     --noOptionsRestore   don't restore collection options
     --noIndexRestore    don't restore indexes
     --w arg (=1)      minimum number of replicas per write
    

    单个collection备份:
    mongoexport -h dbhost -d dbname -c collectionname -f collectionKey -o dbdirectory
    -h: MongoDB所在服务器地址
    -d: 需要恢复的数据库实例
    -c: 需要恢复的集合
    -f: 需要导出的字段(省略为所有字段)
    -o: 表示导出的文件名

    mongoexport的官方说明(可通过mongoexport --help查看):
     --help          produce help message
     -v [ --verbose ]     be more verbose (include multiple times for more
                  verbosity e.g. -vvvvv)
     --version         print the program's version and exit
     -h [ --host ] arg     mongo host to connect to ( /s1,s2 for
                  sets)
     --port arg        server port. Can also use --host hostname:port
     --ipv6          enable IPv6 support (disabled by default)
     -u [ --username ] arg   username
     -p [ --password ] arg   password
     --dbpath arg       directly access mongod database files in the given
                  path, instead of connecting to a mongod server -
                  needs to lock the data directory, so cannot be used
                  if a mongod is currently accessing the same path
     --directoryperdb     if dbpath specified, each db is in a separate
                  directory
     --journal         enable journaling
     -d [ --db ] arg      database to use
     -c [ --collection ] arg  collection to use (some commands)
     -f [ --fields ] arg    comma separated list of field names e.g. -f
                  name,age
     --fieldFile arg      file with fields names - 1 per line
     -q [ --query ] arg    query filter, as a JSON string
     --csv           export to csv instead of json
     -o [ --out ] arg     output file; if not specified, stdout is used
     --jsonArray        output to a json array rather than one object per
                  line
     -k [ --slaveOk ] arg (=1) use secondaries for export if available, default
                  true
     --forceTableScan     force a table scan (do not use $snapshot)
    

    单个collection恢复:
    mongoimport -d dbhost -c collectionname –type csv –headerline –file
    -type: 指明要导入的文件格式
    -headerline: 批明不导入第一行,因为第一行是列名
    -file: 指明要导入的文件路径

    mongoimport的官方说明(可通过mongoimport --help查看):
     --help         produce help message
     -v [ --verbose ]    be more verbose (include multiple times for more
                 verbosity e.g. -vvvvv)
     --version        print the program's version and exit
     -h [ --host ] arg    mongo host to connect to ( /s1,s2 for sets)
     --port arg       server port. Can also use --host hostname:port
     --ipv6         enable IPv6 support (disabled by default)
     -u [ --username ] arg  username
     -p [ --password ] arg  password
     --dbpath arg      directly access mongod database files in the given
                 path, instead of connecting to a mongod server -
                 needs to lock the data directory, so cannot be used
                 if a mongod is currently accessing the same path
     --directoryperdb    if dbpath specified, each db is in a separate
                 directory
     --journal        enable journaling
     -d [ --db ] arg     database to use
     -c [ --collection ] arg collection to use (some commands)
     -f [ --fields ] arg   comma separated list of field names e.g. -f name,age
     --fieldFile arg     file with fields names - 1 per line
     --ignoreBlanks     if given, empty fields in csv and tsv will be ignored
     --type arg       type of file to import. default: json (json,csv,tsv)
     --file arg       file to import from; if not specified stdin is used
     --drop         drop collection first
     --headerline      CSV,TSV only - use first line as headers
     --upsert        insert or update objects that already exist
     --upsertFields arg   comma-separated fields for the query part of the
                 upsert. You should make sure this is indexed
     --stopOnError      stop importing at first error rather than continuing
     --jsonArray       load a json array, not one item per line. Currently
                 limited to 16MB.

    其他导入与导出操作:

    1. mongoimport -d my_mongodb -c user user.dat

    参数说明:

    -d 指明使用的库, 本例中为” my_mongodb”

    -c 指明要导出的表, 本例中为”user”

    可以看到导入数据的时候会隐式创建表结构

    2. mongoexport -d my_mongodb -c user -o user.dat

    参数说明:

    -d 指明使用的库, 本例中为” my_mongodb”

    -c 指明要导出的表, 本例中为”user”

    -o 指明要导出的文件名, 本例中为”user.dat”

    从上面可以看到导出的方式使用的是JSON 的样式.

    您可能感兴趣的文章:
    • mongoDB4.2.8备份恢复与导出导入(推荐)
    • 分布式文档存储数据库之MongoDB备份与恢复的实践详解
    • 使用centos系统中的crontab命令对mongodb定时备份恢复
    • Mongodb实现定时备份与恢复的方法教程
    • MongoDB 导出导入备份恢复数据详解及实例
    • MongoDB使用自带的命令行工具进行备份和恢复的教程
    • Windows或Linux系统中备份和恢复MongoDB数据的教程
    • Mongodb数据库的备份与恢复操作实例
    • MongoDB的备份与恢复
    上一篇:MongoDB为用户设置访问权限
    下一篇:MongoDB常用命令小结
  • 相关文章
  • 

    © 2016-2020 巨人网络通讯 版权所有

    《增值电信业务经营许可证》 苏ICP备15040257号-8

    MongoDB整库备份与还原以及单个collection备份、恢复方法 MongoDB,整库,备份,与,还原,